Spherical ferrite nanoparticles and method for producing the same

Abstract

A method for producing spherical ferrite nanoparticles includes the steps of: preparing a first aqueous solution containing a disaccharide, an alkaline, an oxidation agent, seed particles and divalent iron ions; and conducting particle growth in the first aqueous solution to produce the spherical ferrite nanoparticles.

1. A method for producing spherical ferrite nanoparticles, comprising:
 preparing a first aqueous solution comprising a disaccharide, an alkaline, an oxidation agent, ferrite seed particles and divalent iron ions; and 
 conducting particle growth in said first aqueous solution to produce the spherical ferrite nanoparticles. 
 
     
     
       2. The method as set forth in  claim 1 ,
 wherein said first aqueous solution is prepared by adding the ferrite seed particles and the divalent iron ions 
 to a second aqueous solution comprising the disaccharide, the alkaline and the oxidation agent. 
 
     
     
       3. The method as set forth in  claim 1 ,
 wherein said first aqueous solution is prepared by adding the alkaline and the ferrite seed particles to a third aqueous solution comprising the divalent iron ions and the disaccharide to form a fourth aqueous solution and adding the oxidation agent to said fourth aqueous solution. 
 
     
     
       4. The method as set forth in  claim 1 , further comprising adding trivalent iron ions to the first aqueous solution. 
     
     
       5. The method as set forth in  claim 1 ,
 wherein a concentration of the disaccharide in the first aqueous solution is set within a range of 0.1M to 5M; and 
 wherein a ratio of the concentration of the divalent iron ions to the concentration of the disaccharide is set within a range of 0.002 to 50. 
 
     
     
       6. The method as set forth in  claim 1 ,
 wherein the oxidation agent is at least one selected from the group consisting of nitric acid, nitrous acid, a nitrate and a nitrite.